diff --git a/CMakeLists.txt b/CMakeLists.txt
index 704cb0c..2384cd6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,6 +6,20 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
+# ---------------------------------
+# Flags de compilação (warnings + otimização)
+# ---------------------------------
+if (MSVC)
+    # Warnings fortes no MSVC
+    set(COMMON_FLAGS /W4 /permissive- /O2)
+else()
+    # GCC/Clang: warnings + performance
+    set(COMMON_FLAGS -Wall -Wextra -Wpedantic -O3 -march=native)
+endif()
+
+# Aplica a todos os targets
+add_compile_options(${COMMON_FLAGS})
+
 # -------------------------------
 # Biblioteca mlcpppy
 # -------------------------------
@@ -16,7 +30,7 @@ add_library(mlcpppy SHARED ${MLCPP_SOURCES})
 target_include_directories(mlcpppy PUBLIC ${PROJECT_SOURCE_DIR}/include)
 
 # -------------------------------
-# Executável de exemplo
+# Executáveis de exemplo
 # -------------------------------
 add_executable(example_main examples/main.cpp)
 add_executable(example_instance examples/atributes_usage.cpp)
diff --git a/examples/atributes_usage.cpp b/examples/atributes_usage.cpp
index c45f117..9a2680a 100644
--- a/examples/atributes_usage.cpp
+++ b/examples/atributes_usage.cpp
@@ -2,7 +2,7 @@
 
 #include "mlcpppy/instances/instances.h"
 
-int main(int argc, char const *argv[]) {
+int main() {
         // Exemplo de uso da classe atribute, instances e instance
         Instance a(Attribute(1), Attribute(2.5), Attribute("Pedro"));
         Instance b(Attribute(1), Attribute(2.5), Attribute("Pedro"));
diff --git a/examples/example_binary_tree.cpp b/examples/example_binary_tree.cpp
index 0162f56..5dfad52 100644
--- a/examples/example_binary_tree.cpp
+++ b/examples/example_binary_tree.cpp
@@ -1,6 +1,6 @@
 #include "mlcpppy/data_structures/binary_tree.h"
 
-int main(int argc, char const* argv[]) {
+int main() {
         BinaryTree<int>* binary_tree = new BinaryTree<int>();
         // Isso deixa desbalanceado
         // 20, 8, 22, 4, 12, 10, 14
diff --git a/include/mlcpppy/classifiers/neighbors/kdtree.h b/include/mlcpppy/classifiers/neighbors/kdtree.h
index 004f1f7..154aa77 100644
--- a/include/mlcpppy/classifiers/neighbors/kdtree.h
+++ b/include/mlcpppy/classifiers/neighbors/kdtree.h
@@ -33,24 +33,17 @@ class KDTree : public NearestNeighbor<T, N> {
                 Point<T, N> point_;
                 int depth_;
 
-                explicit Node() {}
-                explicit Node(Point<T, N> point, Node* left, Node* right)
-                    : point_(point), left_(left), right_(right) {}
-                explicit Node(Point<T, N> point, Node* left, Node* right,
-                              int depth)
-                    : point_(point),
-                      left_(left),
-                      right_(right),
-                      depth_(depth) {}
-                explicit Node(Point<T, N> point) : point_(point) {
-                        this->left_ = nullptr;
-                        this->right_ = nullptr;
-                }
-                explicit Node(Point<T, N> point, int depth)
-                    : point_(point), depth_(depth) {
-                        this->left_ = nullptr;
-                        this->right_ = nullptr;
-                }
+        explicit Node() {}
+        explicit Node(Node* left, Node* right, Point<T, N> point) : left_(left), right_(right), point_(point) {}
+        explicit Node(Node* left, Node* right, Point<T, N> point, int depth) : left_(left), right_(right), point_(point), depth_(depth) {}
+        explicit Node(Point<T, N> point) : point_(point) {
+            this->left_ = nullptr;
+            this->right_ = nullptr;
+        }
+        explicit Node(Point<T, N> point, int depth) : point_(point), depth_(depth) {
+            this->left_ = nullptr;
+            this->right_ = nullptr;
+        }
 
                 ~Node() {
                         delete left_;
@@ -59,7 +52,7 @@ class KDTree : public NearestNeighbor<T, N> {
         };
 
         Node* root_;
-        int K_;
+        size_t K_;
         std::priority_queue<std::pair<double, Node*>> bests_;
 
         Node* Build(std::vector<Point<T, N>> points, int depth) {
@@ -80,10 +73,15 @@ class KDTree : public NearestNeighbor<T, N> {
                 std::vector<Point<T, N>> points_right(
                     points.begin() + median + 1, points.end());
 
-                return new Node(points.at(median),
-                                Build(points_left, depth + 1),
-                                Build(points_right, depth + 1), depth);
-        }
+
+        return new Node(
+            Build(points_left, depth + 1),
+            Build(points_right, depth + 1),
+            points.at(median),
+            depth
+        );
+    }
+
 
         Node* NearestNeighbor(Node* root, Point<T, N>& target, int depth) {
                 if (root == nullptr) return nullptr;
@@ -251,7 +249,7 @@ class KDTree : public NearestNeighbor<T, N> {
                         return;
                 }
 
-                int initial_size = points.at(0).size();
+        size_t initial_size = points.at(0).size();
 
                 for (auto& point : points) {
                         if (point.data().empty()) {
diff --git a/include/mlcpppy/classifiers/neighbors/point.h b/include/mlcpppy/classifiers/neighbors/point.h
index 27ffb8e..2085062 100644
--- a/include/mlcpppy/classifiers/neighbors/point.h
+++ b/include/mlcpppy/classifiers/neighbors/point.h
@@ -40,7 +40,9 @@ class Point {
                 std::copy(list.begin(), list.end(), data_.begin());
         }
         const std::array<T, N> &data() const { return data_; }
-        const size_t size() const { return data_.size(); }
+        size_t size() const {
+                return data_.size();
+        }
 };
 
 #endif  // POINT_H
\ No newline at end of file